Tank capacity: ~16 litres is good for moderate-sized work.
Battery: Usually 12 V (or sometimes higher) with 8-12 Ah (or more) for decent runtime.
Pressure / pump: The battery-operated sprayer should maintain consistent pressure (for example 30-70 psi) so spray is even.
Dual mode (“2-in-1”): Ability to operate by battery and also manually if needed (so if battery is low you still can spray) – Example spec shows “Battery Operated 2 In 1 Sprayer 16 lts 12 V/12 A” for a vendor.
Material & build: Tank material should be chemical resistant, UV protected if outdoor, ergonomic straps/backpack if knapsack style.
Coverage & runtime: Some models list how much area you can cover per tank/charge, charging time, etc. For example a 24 L unit: “Charging time: 5-6 Hrs. Dis-charge time: 4-5 Hrs.”
Weight & ergonomics: Having full tank + battery must be manageable; manual mode gives fallback.
Nozzle options & spray patterns: Look for adjustable nozzles, different spray modes (mist/fan/jet) for various applications.
